Improvement in sash-locks



H. T. RAEKE. Sash-Look.

No. 217.819. Patented July 22,1879.

WITNESSES: I U INVENTOR:

ATTORNEYS.

N. PErERs, PnOTO-LITHOGRAPHER, WhSNINGTON, D. C.

UNITED STATES PATENT OEEIoE.

HERMANN T. RAEKE, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN SASH-LOCKS.

Specification forming part of Letters Patent No. 217,819, dated July 22, 1879; application filed February 21, 1879.

b To all 'whom'it may concern:

view of my improved sash-lock. Fig. 2 is a vertical section on line 00 a, Fig. 1. Fig. 3 is a 7 rear view, and Fig. 4 a plan view. Fig. 5 is a section similar to Fig. 2, but showing the cam and bolt thrown back.

The thumb-lever a is pivoted, in horizontal position, to an arm of the metal casing or frame I), which issecured in a recess in the window-casing. The inner end of the lever enters a notch in the lower end of the earn 0, which is pivoted eccentrica-lly in said casing b. One edge of the cam is notched or serrated, and projects through a slot in the casing, while the other has an extension or projection, which is perforated to receive the bar d. A spring, 6, is coiled spirally around the bar d, and serves to throw the serrated edge of the cam out of the casing, into contact with the side of the sash, so that the latter will be held elevated (if a lower sash,) or depressed (if an upper one,) at any desired point.

It is obvious that by pressing against the free end of lever a, the cam may be turned on its pivot against the opposing stress of the spring 0, and thrown back into its casing I) out of contact with the sash B, thereby releasing the latter and allowing it to be lowered.

The frictional action of the cam with the sash is supplemented by the horizontally-sliding bolt f, which is caused to project from the casing b by means of a spring, gthat is to say, the spring 9 causes the said bolt to press against the sash, so that it assists in supporting the latter in any desired adjustment. Besides this function of the bolt, it serves to lock the sash immovably at certain points of elevation or depression, as the case may be, by entering holes or sockets in the sash, as will be readily understood.

The bar (I, which passes through the rearwardly-projecting portion of the cam, is pivoted to the bolt f, and the lower end of the bar is held loosely in a socket in the casing or frame I). When, therefore, pressure is applied to lever to, the bolt f is retracted simultaneously with the cam, because the latter acts against and moves back the upper end of the bar (I, which carries the bolt with it, the bar in such case operating as a lever of the third class. Thus while the cam and bolt are actuated in a forward direction or toward the sash by separate springs, they are retracted by operation of the same lever.

What I claim is- The combination of the bar d and the spiral spring 6, which encircles it, with the eccentric or cam 0, having a rearwardly-projectin g end, through which said rod passes, the sliding bolt f, connected with the rod, and the pivoted lever a, whose inner end enters a notch in the cam, all as shown and described.

H ERMANN THEODORE RAEKE.

Witnesses LoUIs KNORR, OSCAR RooLERKE. 

